Euler symbol

[linuxrider]

Does it make sense to add an abbreviation for the Euler constant upright(e) e.g. eu? Background: elementary charge e and Euler number e in nearby or same equation

[YDX-2147483647]

Honestly speaking, I do not think it should be included in physica.

• You can simply #let eu = math.upright("e") and write $eu$.
• Upright e may not be a universal convention. Wikipedia uses the italic e, and the LaTeX package physics does not offer it.
• Besides, I think eu is too confusing. European Union, Euler's constant γ, …

[linuxrider]

• You are right. A custom definition is easy. And this the way I am already using it.
• There is the standard ISO 80000-2 mentioned in https://en.wikipedia.org/wiki/Mathematical_notation with upright constants. But of course traditionally it is not used everywhere consequently. I am coming from the field of chemistry where we adhere more or less to the IUPAC convention with upright constants.
• Regarding the abbreviation: This was only an example which came to mind first because I'm already using it.

Thanks for your work and feel free to close if this didn't change your mind.

[Leedehai]

Hi - I agree with the difficulty of deciding whether the upright form is the most universal, and naming it "eu" may conflate with others (especially, Euler's constant).

Giving it a longer and more descriptive name makes sense (euler-symbol?), but the benefits would be much less compared to just going with user-customized #let eu = math.upright("e"). The user-customized version is easier to type, and unambiguous (since users defined it themselves).

I'll close the issue for the moment, but thanks for opening this issue & letting me know your use cases!